Saw-mill set-works



(No Model.)

G. W. HUOKABAY. SAW MILL SET WORKS.

1910.401664. PatentedJuly 23,1889.v

Wl NEssEs N. PETERS. Phaeo-mrmgraphar, waingtar\.0.c.

UNITED if STATES PATENT OFFICE.

GEORGE 'W. HUOKABAY, OF GARFIELD, LOUISIANA.

SAW-M l LL SET-WORKS.

` SPECIFICATION forming part of Letters Patent No. 407,664, dated July 23, 1889,

Application iiled September l2, 1888. -Serial No. 285,209. (No model.) l

To all whom t may concern:

\ Beit known that I, GEORGE W. HUCKABAY, a citizen of the United States, and a resident of Garfield, in the parish of Caddo and State of Louisiana, have invented certain new and useful Improvements in Saw-Mill- Set-Works, of which the following is a specification.

My invention relates to certain improvements in head-blocks for saw-mill carriages; and its object is to provide automatic .means for shifting the head-block and log any desired distance before each cut of the saw, and a further ,obj ect is to return the head-blockto its original position after it has passed out to the extent of its movement; and it consists in the parts which will behereinafter described,

Aand pointed out in the claims.

Reference is herein had tothe accompanying drawings, in which similar letters of reference indicate corresponding parts in the several views. l

Figure l represents aside elevation of my invention. Fig. 2 is a top plan view, and Fig. 3 is a detail perspective, of the mechanism for automatically effecting the shift of the headblock.

A represents the base or track upon which the carriage is mounted. The frame of the carriage consists of three parallel bars B C C', connected by cross-bars B `B2 B3. A crossstand D is mounted upon andiixed to the carriage between the cross-bars B/2 B3. A boxing D is iiXed to one side of the stand D, and said boxing is provided with an opening for the reception of the smooth part E of the screw E, the outer en d of said screw being provided with a gear E2 and a crank E3. The smooth part E of the screw is provided with a circumferential bead E5, which iits a corresponding groove in the part D to prevent the lateral movement of the screw and its gear. A sliding head-block F is mounted on the stand D, and said head-block is provided with a screw-threaded opening F for the reception of the screw E. The upper outer side of the frame-piece C is provided with a hinged bar C2, and O3 are the hinges thereof. A movable toothed bar G isseated on the upper side of the bar C inside of -thebar C2. H is a bar pivotally suspended by hanger-arms H from the outer side of the frame-bar C', and I is a shorter bar of like construction pivotally Two separated flat blocks L are secured to the main frame, upon which` the track is located, near the side ofithe carriage, and L L2 are two arms pivotally secured between the blocks L. Theinner ends of said arms are connected by a rod L3, and M represents the lower end of a cord secured to the outer end of the upper arm L.

A log is represented by the letter P, and Q is the saw.

The operation is as follows: While a log is being sawed the toothed bar Gand its gearwheel E2 move with the carriage. of the 4head-block is made just before the log advances on the saw, and said shift is effected by arresting the movement of the toothed bar, which is eifected by causing the arm L to lock with the said bar, and the momentary stoppage of said toothed baizwill cause the gear E to rotate and shift the head-block, which will be more fully hereinafter specified. The thickness of each cut of the log or the eX- tent of movement of the head-block between each cut is regulated by the bars H I. These bars may be of any length and any number, and one or more may be used at the same time,`.as desired. Ashort bar (I for instance) will effect a shorter movement of the headblock than the longer bar H. Suppose the bar I to represent one-inch lumber and the bar H one inch anda half, and a bevel end of each bar the width of the cut of the saw, so that when the bar H is used the lumber cut will be exactly one inch and a half in thick-` ness, and the lumber sawed while the barIis used will be exactly one inch in thickness. Fig. l represents the position of the parts when the bar H is in use, the head-block has been shifted, and the carriage is presumed to be advancing in the direction of the arrow, the bar I being held up by means of the bent end KS of the rod K, the bent end of the rod The shift IOO K being turned so as to permit the hangerarms H and their bar H to hang down, as shown in Eig. 1. After the saw has made its cut, and on the return of the carriage, the heel of the bar H will encounter and ride over the under arm L2, Fig. 3. On the next advance movement of the carriage in the direction of the arrow, said bar H will again encounter the inner end of the arm L2 and depress said arm, drawing down the rod L3 and inner end of the arm L, thereby causing said arm L to engage with the toothed bar G, and firmly retain said bar,while the carriage moves onward, the bar sliding on the carriage during the engagement of the arm L with said toothed bar, and such engagement continues while the arm L2 is depressed by the bar H. After said bar has passed forward beyond the arm L2 the inner ends of the arms L L2 will rise by gravity of the outer ends of the arms, causing the disengagement of the arm L with the toothed bar. The block H4 holds the bar H and its hanger-arms rigid while the said bar moves forward over the under armvLz, but said bar and its arms fold on the return movement of the carriage while the bar is Y passing over the said under arm. Any thickness'of lumber-that is to say, any desiredl revolution of the gear E2 and effect a movement of the head-block to correspond with the thickness represented by the combined arms H I. After the head-block has been moved outward to the desired ext-ent, it may be returned ready for another log in the following manner: The cord M is intended to extend upward over and around a pulley or otlersuitable device, Vso as to be accessible to the hand of the Sawyer. By actuating said cord the arm L may be caused to lock with the toothed bar G, and said bar held so as to slide on the carriage back to its former position, when the carriage is moved backward, the locking and retention of said bar causing the gear E2 and screw to turn and thereby return the head-block to the desired position.

It will be observed that the hinged bar C2 serves as a guide for the toothed bar, and that when said bar C2 is turned outward on its hinges the toothed bar may be moved out of contact with the gear E2. The said gear and its screw may be rot-ated by turning the crank E3.

Having thus described my invention, I claim as new and desire tosecure byLetters Patent of the United Statesl. The combination, with a saw-mill carriage, of a toothed bar seated thereon, an arm for intermittently locking the said bar, so as to permit the carriage to move independently of the same, the gear-wheel engaging said bar, the screw to which said gear-wheel is attached, and the movable head-block operated by said screw, and the bar or lever whereby the movement of the toothed bar is arrested and the parts operated to move the head-block, substantially as specified.

2, rlhe combination, with a saw-mill carriage, of a toothed bar seated thereon, a beveled bar or bars suspended therefrom by hanger-arms L', the rods K K having arms K3 and cranks K2, whereby the bar or bars may be elevated, the blocks for engaging the han ger-arms, the gear, screws, and head-block,

GEORGE 'W. HUCKABAY.

Vitnesses:

J. P. Sco'rfr, FRANK A. Fours. 

